Transmission



G. HEINISH TRANSMISSION Feb. 9, 1932.

Filed July 13. 1927 4 Sheets-Sheet 1 m m W n N m w m W m H% A Q m e G. 7. V! B HH FebTQ, 1932. HElNlSH 1,844,037

TRANSMISSION Filed July 15. 1927 4 Sheets-Sheet 2 George Heinis ATTORNEY).

r1 I Q m] INVENTOR.

G. HEINESH TRANSMISSION Feb. 9, 1932.

Filed July 15. 1927 4 Sheets-Sheet 3 INVENTOR. @corge km/ah By Q4 @M A TTORNEYS.

Patented F ch. 9, 1932 UNETED STATES PATENT. OFFICE GEORGE HEINISH, F AKRON, OHIO, ASSIGNOR TO THE STAR DRILLING MACHINE COM- IPANY, OF AKRON, OHIO, A CORPORATION OF OHIO TRANSMISSION Application filed July 13,

This invention relates to transmissions particularly of the planetary type.

The general purpose of the invention is to impreve upon transmissions of this type by the provision of an improved brake device for use on the revolving casing or drum.

These transmissions have not been entirely satisfactory for the reason that the braking devices utilized therewith exert a bending force on the shafting and cause undue wear of the bearings and quite frequently breakage of the bearings, orv even the casings. The object of the invention, therefore, the provision in combination with this type of transmission of an improved brake therefor.

The foregoing and other objects are obtained by the device illustrated in the accompanying drawings and described below, it 20 being understood that the invention is not limited to the specific form thereof shown and described.

Of the accompanying drawings, Figure 1 is a side elevation of a transmis- 25 sion embodying the invention;

Figure 2 is a section on line 22 of Fig ure 1;

Figure 3 is a plan thereof; and

Figure 1 is a longitudinal, diametral sec-.

so tion therethrough.

Referring to the drawings, the numerals 10, indicate spaced, longitudinal channels and 11, 11 transverse channels connected thereto providin a support for a power unit including a transmission 12 of the planetary reverse gear type.

The transmission 12 includes a driving member 13 which may be connected to the fly wheel 1 1 of a motor (not shown), said member being mounted on a pilot shaft 15 driven by the motor and being journaled on a driven shaft 16 by bearing 17. Member 13 has a drive gear 18 thereon which is arranged to drive through reversing planet gears in= eluding those indicated at 19 and 20 in the usual way to a driven gear 21 mounted on shaft 16. Theplanet gears of the transmission are journaled upon studs, such as indicated at 22 and 23, mounted in casing 12, casing 12 being journaled upon member 13 1927. Serial No. 205,382.

by bearing 24: and on the driven shaft 16 by a bearing 25. A clutch 26 is provided to connect the transmission drum or casing 12 through the bearing. To prevent throwing of theoil from the bearing, an annular pocket is provided at 29 about the outer side thereof to receive the oil and radial ducts 30 are provided in casing 12 between studs 23 through which the oil from pocket 29 is forced back into the casing by centrifugal action.

The bearing 25,-is arranged to be similarly lubricated, the construction of casing 12 about this bearing providing a baffle 25= so that a separate oil baffle need not be employed, the

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pocket 31 about the outer side of the bearing receiving the 'oil passing through the bearing and radial ducts inthe casing 12 delivering the oil from pocket 31 back into the easmg. I i

Throwing of oil from between the casing parts 12 and 12 is prevented by forming circumferential grooves, serrations or the like, asindicated at 33, on at least oneof these parts or sections and bolting the parts together {with a gasket 34: of compressible material disposed therebetween. V

The brake device employed to operate bands 27 and 28 is best seen in Figure 2. The top band 27 is connected at one end to brackets 10 on one side of the casing 12 by an adjustable U-bolt 11, the other end of this band heingconnected to a bell crank lever 12 pivoted on brackets43 on the other side of the casing 12. The lower band 28 is connected at one end by an adjustable U-bolt 14 to brackets 43 and at the other end to a bell crank 45 pivoted on brackets 10. Bell cranks 12 and for shifting the clutch, a clutch shifting arm 49 for operating the shifting yoke 50 being yieldingly connected by aspring 51 to a link 52 connected to rod 46 at 53. This yielding connection is adapted not only to permit application of the brake bands 27 and28 withgout effect upon the clutch shifting mechanism, but also provides yielding means normally holding the bands and28 free of casing v 12. A stop device 54; is ;.arranged on the, clutch shifting device to limit its 'movement to released position and to cause the spring 51 to compress upon application of the brake bands. Toggle actuated pressure applying cams 55, 55 are employed in theclutch so that itv Willremain engaged when shifted into en? gagement by lever 48,1 the connectionbeing suchfthat afurther movement of lever 48 after disengagement of theclutch will apply the brakeban'ds '27 and 28 and, vice versa, a further movement of lever 48 after disengaging the bands 27 and 28 Will engage the clutch.

By the use, of two bands 27 and28and actuating devices therefor operating downwardly upon the upper band and upwardly uponthe lower band,no bending forces are transmitted tothe shaft through th e casing bearings 2e and 25 to cause undue vvear or breakage thereof or to cause breakage of the casing 12, the forces tending to bend the shaft being neutralized.

It Will appear from the foregoing that by the invention, the brake devices employed with planetary transmissions or reversing gearshave been greatlydrnproved. It ivill also be apparent that modifications of the invention maybe resorted to Without departing from the spirit thereof or the scope of the appended claims h s lam is i k 1. A brake construction for planetary gear transmissions ofthat type including central shafting an d rotatable drum on the shaftin which the gears are mounted includ ing sun gears on the shatting andplanet gears j ournaled in the druin, said brake comprising opposite members adapted to. be arranged upon opposite sides of'said drum, andrmeans for. simultaneously operating said members against said drum .Whereby' braking stresses tending to bend said shafting are neutralized. 2, brake construction for planetary gear transmissions of that type including centi al shafting and a rotatable drum on the shafting in which the gears are mounted including sun gears on the shafting and planet gears journaled in the'drum, said brakefcomprising opposite bands adapted to be arranged upon opposite sides of said drum, and means for simultaneously tensioning said bands against the opposite sides of the-drum in opposite directions, whereby braking stresses tending to bend said shafting are neutralized. ,Y

' GEORGE HEINISH. 

